Here's one I found that I *really* like.  It comes from the book "Aromatherapy 

Blends & Remedies" by Franzesca Watson.  This recipe smells very similar to 

Carol's Daughter's Khoret Ahmen Oil and has most of the same ingredients.  I've 

used it for a couple of months now, and I really like it. It can be used as a

hot oil treatment, a hair & scalp oil, or a spritz.

2 oz jojoba oil

12 drops rosemary Essential oil

10 drops bay Essential oil

9 drops atlas cedarwood Essential oil

You can use this same recipe (without the jojoba oil) in 4 oz. of water in a 

spray bottle as a spritz for your hair.

Here are more remedies I found posted on-line.
I have not tried any of the ones below.  
Be certain to do your own research before using.

~~~~~~~~~~~~~~~~

Dandruff

1) Make an infusion of 1 ounce each of fresh or dried rosemary and sage in 

2 cups of water. Let steep for 24 hours, then use daily as a hair rinse.

2) Boil 5 heaping tbsps dried thyme in 2 cups water for 10 minutes. Strain 

and cool. Pour 1/2 mixture over clean, damp hair. Massage into scalp, do not 

rinse. Use second half of solution another day.

3) Instead of shampooing, massage handfuls of baking soda into the hair and 

scalp to absorb oil and to loosen dead skin on scalp. Rinse thoroughly, 

use no other shampoos. While initially the hair may seem dry, after several 

weeks, dandruff will be gone and hair will be smooth and shiny.

4) Mint Rinse

Boil:

1 cup water

1 cup apple cider vinegar

1 handful of fresh mint leaves

Strain and pour into a container. With fingertips, massage solution into the 

scalp, let dry without rinsing out.

5) Soothing Herbal Hair Rinse

Combine equal parts of dried rosemary, comfrey, witch hazel leaves and nettles 

to make about 1/2 cup. Add to 2 cups of water in a covered pot. Bring to a boil. 

Remove from heat and let steep overnight. Strain. Shampoo and rinse hair then 

use herb tea for a final rinse to relieve itchy, flaky scalp.

~~~~~~~~~~~~~~~~~

Tonic for Dandruff

Essential oils can be used in a base of distilled water to

provide a hair tonic for various uses. Here is a tonic that

will help control dandruff if used several times a week.

You will need:

1 1/2 cups distilled water (or rosewater)

Witch hazel (available at most drugstores)

3 teaspoons of cider vinegar

Oil of Lavender

Oil of Rosemary

Oil of Tea Tree

Mix the water, 1/4 cup of the witch hazel, the cider

vinegar, six drops each of the lavender and rosemary oils,

and three drops of the tea tree oil in a glass bottle.

Shake this well and apply it to your wet or dry hair

several times a week. Massage the tonic into your scalp.

You do not have to rinse your hair afterward.